Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 1 | // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | var stdlib = {}; |
| 6 | var foreign = {}; |
| 7 | var heap = new ArrayBuffer(64 * 1024); |
| 8 | |
| 9 | function Uint32Div(divisor) { |
| 10 | var name = "div_"; |
| 11 | name += divisor; |
| 12 | var m = eval("function Module(stdlib, foreign, heap) {\n" |
| 13 | + " \"use asm\";\n" |
| 14 | + " function " + name + "(dividend) {\n" |
| 15 | + " return ((dividend >>> 0) / " + divisor + ") >>> 0;\n" |
| 16 | + " }\n" |
| 17 | + " return { f: " + name + "}\n" |
| 18 | + "}; Module"); |
| 19 | return m(stdlib, foreign, heap).f; |
| 20 | } |
| 21 | |
| 22 | var divisors = [0, 1, 3, 4, 10, 42, 64, 100, 1024, 2147483647, 4294967295]; |
| 23 | for (var i in divisors) { |
| 24 | var divisor = divisors[i]; |
| 25 | var div = Uint32Div(divisor); |
| 26 | for (var dividend = 0; dividend < 4294967296; dividend += 3999773) { |
| 27 | assertEquals((dividend / divisor) >>> 0, div(dividend)); |
| 28 | } |
| 29 | } |
| 30 | |
| 31 | var div = (function(stdlib, foreign, heap) { |
| 32 | "use asm"; |
| 33 | function div(dividend, divisor) { |
| 34 | return (dividend >>> 0) / (divisor >>> 0) | 0; |
| 35 | } |
| 36 | return {div: div}; |
| 37 | })(stdlib, foreign, heap).div; |
| 38 | |
| 39 | for (var i in divisors) { |
| 40 | var divisor = divisors[i]; |
| 41 | for (var dividend = 0; dividend < 4294967296; dividend += 3999773) { |
| 42 | assertEquals((dividend >>> 0) / (divisor >>> 0) | 0, |
| 43 | div(dividend, divisor)); |
| 44 | } |
| 45 | } |